3
votes
1answer
489 views

How to program light sensor to follow moving light using NXT

Cannot figure out how to simply program Lego Mindstorm NXT robot to follow another moving robot that has a bright LED light attached to it. Currently my programme looks like this:
4
votes
1answer
297 views

How can I wire up the LEGO 2838?

I would like to know how to hook up the LEGO 2838 9v motor. I understand that the Power Functions extension wire is compatible with the 9v system, but how on earth do I wire them up?
0
votes
0answers
25 views

Programming sensor to follow light [duplicate]

Cannot get sensor to follow light on other moving robot.
2
votes
1answer
392 views

Trying to get a modified traffic signal challenge worked out

The challenge is for a robot to go around the perimeter of a rectangular field and execute 90 degree turns when it gets within 4.5 inches of a wall. Simultaneously, if the bot encounters a red flag, ...
1
vote
1answer
227 views

Trouble with Commander app: Using buttons to control motors

I'm having trouble with the Commander app for Android. I've put an EV3 into set 8448. I'm using one of the large motors for propulsion and a medium motor for rack and pinion steering. I don't have the ...
5
votes
1answer
186 views

Are coloured bricks used by Set Designers recycled to make black bricks?

I heard on a podcast of the Adam Savage Project that the master builders (designers of 'sets' of LEGO) are allowed to use as many blocks as they need to design a certain set. All of the bricks they ...
-1
votes
3answers
222 views

Will they ever make LEGO The Amazing Spider-man 2 sets? [closed]

I realized that they released an exclusive minifigure of The Amazing Spider-Man 2 in the San Diego Comic Con but I am still wondering if they will ever make LEGO set(s) based on the movie.
3
votes
2answers
1k views

Looking for a Basic Lego set with mostly large bricks

I am looking to buy my son his first set of LEGO bricks (because my mom will not give me my old ones!!!). Most of the 650ish piece sets I have looked at contain a large amount of 1x2, 2x2, etc. I am ...
4
votes
1answer
191 views

Help identifying a black round piece with three rings

I'm on a personal project to document the brick list for building every one of Chris Deck's Star Wars miniatures (http://sw.deckdesigns.de/minis.htm), and I'm unable to find in the Lego catalogue or ...
4
votes
2answers
359 views

Can anyone identify these Bionicle sets?

Can anyone identify these Lego pieces? They were given to us in a bin of toys, and we cannot identify them. We know they're Lego, and have a 2002 date on them.
2
votes
2answers
73 views

Index of the City sets by category

I'm running trough bricklink, peeron and brickowl, but I can't find a "good" (I mean 'fitting my idea') index to browse across city sets. Is there a kind of list like vehicle cars trucks planes ...
5
votes
1answer
235 views

How can I tell which LEGO minifigure I found?

I found a mini-figure on the the ground by a recycling bin. I want to figure out what set/collection he belongs to but can't find anything other than how to tell what you're getting in a blind bag. ...
1
vote
1answer
3k views

EV3 brick cannot connect my to computer

I can't connect my brick to my computer. It keeps saying it can't communicate with the brick. My brick has no firmware. My friend said to change the USB cable but it still doesn't work. I can't ...
1
vote
4answers
361 views

What adhesive can bond LEGO bricks to metal?

The Scouts are making some Christmas decorations using LEGO, and we need to stick them on to some metal stands. Could anyone please advise the best glues and process (e.g. sanding, etc.) to join ...
3
votes
1answer
351 views

Large Lego Minifig Styles

I'm pretty sure the lego figure on the right is the daughter from a 1977 set Nurse and Child. But what about this style of jumbo minifig on the left with arms and legs that bend? When was that from? ...
3
votes
2answers
364 views

Identify these (Technic Steering) parts?

These three parts do not have part numbers on them, but it is clear they are LEGO parts (they have LEGO printed on them). I am trying to track down the set that these belong to, or at least a part ...
5
votes
1answer
122 views

Name of trunk-like objects

What's the name of the black curved elements in the header/banner of https://www.flickr.com/groups/lego_arboretum/? The full picture along with some others of the same diorama can be seen here: ...
7
votes
1answer
340 views

What element is this a piece of, and how can I repair it?

Yesterday, as I was putting away some Lego, I saw the following obviously broken piece. I couldn't figure out what element this was a piece of, so I was all ready to ask it here, when I came ...
3
votes
1answer
370 views

What is this weird and specific technical part?

I found this part among some parts I bought. It looks like it serves a specific purpose. What is it?
1
vote
1answer
156 views

What can I do with this steering wheel?

I found this steering wheel + "dashboard" combination among some parts I bought. What is it, in what kind of models is it used, and can I do anything else with the "dashboard" (for lack of a better ...
2
votes
2answers
229 views

Identify minifigure torso - yellow with blue “N” on front

I've got a yellow torso (with yellow arms). The front (I believe) has a large blue letter 'N' with a orange drop shadow. Otherwise the torso is plain. I've tried loads of search terms on bricklink to ...
3
votes
1answer
742 views

What are these bricks with filled interior and holes/tubes going through?

I recently bought at haul and found a bunch of these regular sized bricks. Can anyone identify the for me? They are 2x4 bricks, but with holes in the side of the bricks: From: ...
2
votes
1answer
157 views

What are the bricks in this picture/video?

Can someone please identify the pieces in this picture? I'd like to acquire these, but I'm not a LEGO enthusiast, so I don't really have an idea where to start. For reference, the picture was ...
3
votes
1answer
249 views

What is this upside down roof peak or boat hull?

Here's another mystery piece from my collection. I'm not 100% sure it's genuine LEGO, but I would love to know whether it is, and if so, what part. It attaches to the bottom of a 2x8 brick securely. ...
2
votes
2answers
263 views

Part Identification - bricks with posts

I have two unusual lego pieces that came from a collection of used legos that mostly seem to date from the 1970's that I am unable to identify using LDraw's ldfind app. What are these parts, and if ...
3
votes
3answers
2k views

NXT Brick will not update firmware

I'm running 6 NXT robots in an introductory class. Occasionally we've had bricks that would not accept a program and I've reset the brick by pushing the reset button under the battery pack as well as ...
4
votes
3answers
2k views

Is the LEGO Midstorms EV3 software compatible with OS X yosemite?

OS X Yosemite (10.10) was just released yesterday. I want to upgrade, but I am worried that the EV3 software will be incompatible. What should I do? A. Upgrade B. Stay on OS X Mavericks (10.9)
5
votes
3answers
324 views

9v and Power Functions Hybrid?

I am building a train layout and I am running some of my track through a tunnel. I would like to know if I could hook up a 9v train motor at the opposite end of my train. The front will use Power ...
3
votes
1answer
339 views

Help identify this 70s or 80s lego space set

I bought some bags of LEGO bricks which appear to contain a 1970's space set in it. I want to find instructions to put it all back together.
15
votes
2answers
3k views

How to tell the different ages of pieces

I know that LEGO bricks have changed over the years, with regards to moulding pip locations, element i.d. numbers printed inside etc, but I was wondering if anyone knows when these changes happened? ...
6
votes
3answers
200 views

Was it once possible to put a 1x1 round into a minifig cup?

I remember being able to put a 1x1 round brick into the top of a minifig cup before my dark age (the period of time that a person stops building with Lego, up to the time they pick up the bricks ...
6
votes
1answer
292 views

What lego set is this? Possibly a pirate ship?

my wife picked up this lego set at a garage sale. The owner claimed it was a ship, perhaps a pirate ship, and that the set was complete. It does have something resembling a bow, and several tall ...
6
votes
1answer
193 views

Help with identifying lego sets

Our family (with very big hearts) gave us some lego they found. But... I do not know what sets they are from. I already identified 11 sets, but cannot find the last 4 (I think) Could you please help? ...
0
votes
1answer
133 views

Identify bulldozer truck -probably from early 90"s

Have a bulldozer looking truck with green rocket boosters on it and silver arrows, silver knives on each side of the dome like top Colours: black green, clear green dome figure has clear green ...
5
votes
1answer
167 views

Can anyone identify this spinner with 1..5 and a skull?

My son has just inherited a large box of Lego, we're hoping someone can help identify what set this might be from.
11
votes
2answers
805 views

How can I connect the RCX 2.0 to an external power source?

I want to build an auto-feeder with the RCX 2.0 for my cat. The problem is, that I often had to exchange the batteries. Is there an adapter for the RCX to connect it to a power point?
8
votes
4answers
791 views

Can I build a faster LEGO train motor?

I was going over LEGO Power Functions train motors, and I was not satisfied with the speed. Speed seven is fast enough to derail the train on the curve, but not fast enough realistically. I am ...
3
votes
1answer
74 views

Unlimited engine option does not work

I work in a school and all my Lego NXT bricks have the same problem. Unlimited choice in the activation time engine does not work. The other functions (rotation, and second degree) are going well. So ...
4
votes
2answers
444 views

How do I make my logo/mascot into a custom LEGO model?

I operate an Indoor Playground & Cafe and would love to find out how to make my mascot/logo into a 4' custom LEGO sculpture. Any assistance appreciated! A bit of looking indicates that LDD will ...
2
votes
1answer
345 views

What set does this minifigure head come from?

I came across this picture: I think the body is from The LEGO Movie Pajamas Emmet polybag, but have no idea where the head is from.
15
votes
1answer
473 views

How to Decipher Lego Building Instructions Filenames?

On the official site for downloading lego instructions, the filenames are often quite cryptic, and many sets have as many as six different files you can download and sometimes it's hard to tell which ...
6
votes
1answer
189 views

Is it possible to create your own wheel?

After my other question, i pretty much have a bicycle design all planned. My problem now is with wheels. None of my LEGO wheels are big enough to work on a bike. And, the biggest ones are all pretty ...
3
votes
1answer
572 views

LEGO TECHNIC CyberMaster Software

I come again to ask a favor. Can someone share the installation CD in English of LT 8482 CyberMaster or where can I download the software in English??
6
votes
2answers
464 views

Chinese Knockoffs?

I'm looking at the Lego Super Star Destroyer on eBay and I see that a number of people are selling it for ~$600 USD. From time to time there are bids that sell at ~$300 USD that claim to be sealed and ...
7
votes
7answers
1k views

How can I remove permanent marker from a LEGO brick?

I need to remove permanent marker from hard plastic. How can I do it?
1
vote
1answer
308 views

Lego EV3 - sending direct commands over RFCOMM Channel (Objective-C, Xcode)

I successfully open RFCOMM Channel to Lego EV3 brick with code: IOBluetoothDevice *device = [IOBluetoothDevice deviceWithAddressString:@"xxxxxxxxxxxx"]; IOBluetoothRFCOMMChannel *rfCommChannel; ...
5
votes
1answer
221 views

Flash update breaks the Mindstoms NXT viewer

After udating to the lastest version of Flash on my Macbook Pro (OS X 10.7.4) The Mindstorms NXT software that comes in the box no longer displays the build instructions. It does load up, but the ...
5
votes
1answer
2k views

How do I get the Mindstorm EV3 software to recognize an NXT brick via Bluetooth?

I'm trying to program my NXT brick via the EV3 software over a Bluetooth connection. I can connect it via USB (although that too failed initially but has since resolved; not sure why) but I'd really ...
6
votes
4answers
873 views

Removable glue for LEGO models

I want to glue my 4-year-old's LEGO bricks, but I want to be able to remove the glue when he is older. What is the best glue to use that is removable and okay to use on LEGO bricks?
6
votes
2answers
672 views

Communication between two Ev-3 bricks

How the communication between two Ev-3 bricks is done over Bluetooth? What is the nature of data that can be communicated?

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